銀奈米粒子與銀奈米線摻雜於電洞傳輸層應用於高分子發光二極體之元件特性探討

林宥勳(Yu Shiun Lin)

指導教授 ： 鄭榮偉 ； 何正榮

國立中正大學/工學院/機械工程學系/碩士(2013年)

摘要

本研究探討摻雜不同比例的銀奈米粒子(Silver nanoparticls, Ag-NPs)到電洞傳輸材料PEDOT:PSS內製作複合膜，以及將銀奈米粒子和銀奈米線(Ag nanowires, Ag-NWs)塗佈於氧化銦錫(Indium Tin Oxide, ITO)表面，再利用PEDOT:PSS修飾薄膜，最後將其應用於高分子發光二極體(PLED)，觀察複合膜對元件特性的影響。第一部分的研究結果顯示，添加銀奈米粒子至PEDOT:PSS內製作複合膜，因為銀奈米粒子具有增進電洞的傳遞能力，增強了相對電壓下的發光亮度，因此提升元件的發光效率。第二部分，利用銀奈米粒子改質的ITO表面，經由PEDOT:PSS修飾降低了薄膜的粗糙度，因此也降低薄膜可能產生的漏電流對元件特性的影響。 第三部分，利用銀奈米線改質ITO，結果顯示銀奈米線經過加熱氧化後，變為氧化銀線可改善ITO表面功函數，增進電洞傳遞能力，製作為元件後可改善了電子與電洞注入的平衡，因而提高元件的效能。

關鍵字

銀奈米粒子 ； 高分子發光二極體 ； 銀奈米線

並列摘要

This study investigated the effects of a nano-composited film on the characteristics of a polymer lighting diode (PLED). The first part of this thesis reports on doping various concentrations of silver nanoparticles (Ag-NPs) to the hole transport layer PEDOT:PSS as the nano-composited thin film. On the second and third parts, the nano-composited film are obtained by reforming the indium tin oxide (ITO) surface respectively using Ag-NPs and Ag-NWs (Ag nanowires) followed by coating a PEDOT:PSS modification layer. Results of the first part show that the nano-composited film can enhance the PLED’s brightness because the existence of the Ag-NPs can boost the transportation of holes that leads to a higher resultant device luminous efficiency. The second part indicates the PEDOT:PSS modification film is able to smooth the surface roughness induced by the addition of Ag-NPs that results in preventing the influence of current leakage on the device’s performance. The third part demonstrates, due to the thermal oxidation of Ag-NWs, the effective work function on the ITO surface is modified that enhances the hole transportation, thereby improving the resultant device performance.

並列關鍵字

silver nanoparticles ； Polymer light-emitting diodes ； silver nanowires

參考文獻

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